BASILLA (Saint) Virgin Martyr (May 20) (3rd century) A Roman maiden of noble lineage, one of the victims of the persecution under Valerian and Gallienus (A.D. 257). The Acts of her martyrdom are not, however, such as to merit credit in regard to details. Her relics discovered in the seventeenth century, have been translated to Brittany. Possibly, this Saint Basilla is identical with the Saint Babilla also commemorated on May 20, of whom the Roman Martyrology makes no mention.